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#4810239 - 07/10/18 12:38 PM Sea foam and GDI
dabo72 Offline

Registered: 05/23/17
Posts: 18
Loc: ga
Is sea foam safe to run in fuel tank once in a while in a vehicle that is GDI? Thanks

#4810247 - 07/10/18 12:43 PM Re: Sea foam and GDI [Re: dabo72]
nthach Offline

Registered: 01/02/04
Posts: 3977
Loc: California
You can run it, but it won't have any effect to clean up the valves. You need to either introduce a cleaning agent past the throttle body via a centrally-located vacuum point or take off the intake manifold and media blast the valves with ground walnut shells.

#4810279 - 07/10/18 01:08 PM Re: Sea foam and GDI [Re: nthach]
dabo72 Offline

Registered: 05/23/17
Posts: 18
Loc: ga
Yes. I understand about the valves not being cleaned but will it help with anything else. I have a catch can installed to help the carbon issue.

#4810300 - 07/10/18 01:29 PM Re: Sea foam and GDI [Re: dabo72]
Audios Online   content

Registered: 11/19/11
Posts: 944
Loc: Lyndhurst NJ
No I doubt it will do much else, maybe maybe some catalyst cleaning after combustion? Might clean up whatever gunk is inside combustion chamber, but I doubt much else. I wonder if running it in crankcase will do anything from the fumes attacking the carbon through pcv?
2002 VW Golf TDI-Mobil 1 5/40 TDT
2005 BMW M3 BMW Twin Power 10/60
1998 BMW M3/4/5 Fuchs 5/40
2007 Mercedes GL320 CDI Fuchs 5/40 GT Pro XTL

#4810410 - 07/10/18 03:21 PM Re: Sea foam and GDI [Re: dabo72]
wemay Online   happy

Registered: 04/04/12
Posts: 8986
Loc: Southeast Florida
It will keep injectors clean and in turn maintain the spray pattern consistent with factory spec. This too is important to GDI platforms.
17 Sonata Sport 2.4L
NAPA Full Synthetic 5w20 | OEM

13 Santa Fe Sport 2.0T
Valvoline MaxLife 5w30 | M1-104

#4810678 - 07/10/18 08:01 PM Re: Sea foam and GDI [Re: dabo72]
FlyPenFly Offline

Registered: 08/04/04
Posts: 262
Loc: San Diego
I believe the injectors in GDI engines stay clean due to the incredible high pressures they operate in.
2014 Mercedes GLK350 3.5L DFI
2014 Mercedes E350 Coupe 3.5L DFI
2007 Suzuki Grand Vitara 2.7L V6

#4811793 - 07/11/18 09:13 PM Re: Sea foam and GDI [Re: dabo72]
AMC Offline

Registered: 10/17/10
Posts: 897
Loc: South Eastern, CT
For GDI cleaning, get the aerosol seafoam and spray it directly into the intake by sticking the straw past the butterfly valve.

That should at least help the backs of the valves a little bit. I am guessing you would have to do this procedure pretty often, say every 10,000 miles or so, in order to keep them clean. Seafoam is pretty weak sauce by today's standards.
11 Chevy Silverado - PP 5w-30
10 Ford Focus - QSAD 5w-20
14 Yamaha Super Tenere - Delo 15w-40